I can get 2darray's new Winter Golf game to crash a tab after just a few levels. The tab hangs and the music gets stuck. I can close the tab, but it takes a few seconds to actually close. Chrome 70.0.3538.110 on macOS 10.14.1.

I suspect it's related to some math operation, that tends to coincide with cpu-heavy carts.

Until I can track this down properly, I've worked around it by recompiling with emcc -O1. The fact that -O2 triggers it, only in a more recent of version of emscripten suggests there might be some code in 0.1.12 that has (usually dormant) undefined behavior.